Incandescent electric lamp.



No. 832,730. PATENTED OCT. 9, 1906.

H. C. HUBBELL.

INCANDESGEBVI` ELECTRIC LAMP.

APPLICATION FILED JAN. 26, 1905.

HARRY oRoss` HUBBELL, or JERSEY CITY, NEW JERSEY.

IINCANmiser-:NT r-:LE'TRIC LAMP'.

. Specication of Letters `Patent. i

ratented'oct. e, 190e.

.application nednnuary 26,1906. seran No. 242,769.

To all whom it may concern:

Be it known thatI, HARRY CRoss HUE- BELL,- a citizen ofthe United States, residing at Jersey City, in the'county of Hudson and State of New Jersey, have invented new and useful Improvements in Incandescent Electric Lamps, of which the following is a specifiy the :(spring-wires in order that a connection coul not readily be made between the two i ends of the platinum points. With lamps of this type it has been possible, unless special provision has been made to prevent it, to connect the two platinum points by placing a knife-blade or lother device between them until the wires are heated toa dangerous incandescence.

.One of the. objects of this invention is to` overcome this defect, more' especially in a lamp 1'n which a reflected light is producedhavin no shadows cast which will interfere with t e effectiveness of the lamp.

lThese and other objects are attained by.

means of the construction illustrated in the accompanying drawings, in which- Figure 1 is a front elevation of a lamp made in accordance with'my present invention. Fig. 2 is a similar view and showing the positions assumed by the ends of the bulb when the same is broken. Fig. '3 is a perspective view of a portion of the lamp with the bulb removed. Fig. 4 isa side view of the bulb removed from the lamp., Fig. 5 is a face view of the illuminating portionof the lamp and showing a temporary or auxiliar bulb in place for use. p Y v.

ileferring to the drawings for a more particular description of the invention, the numeral 1 designates a lamp easingor body,

which may be 'of any suitable structure or configuration, and 2 is a glass globe secured to the lamp-body. The numeral 3 denotes a white or enameled reflector, and 4 4 are two binding-screws which secure inplace the'two fine-wire supports-5. 5, said supports each comprising a base-loop throng wlpch the binding-screw 4 passes to hold said support in place. Extending outward from the loo 6 is a supporting-arm 7, the end of whic terminates in a finger 8, which may be suitably extended at an angle to the arm 7 for a purpose which 'will presently appear.

The festoon-bulb 9 has extended through its opposite ends a latinuln terminal 10, the outer ends ofsai wires being bentinto loops 11, designed to engage and be supported from the fingers'S on the supportingarms 7. Alament may be connected to the platinum wires 10 inside the bulb 9.

The lamp is especially designed tobe connected to a vertical support, and since the iingers 8 are slightly inc ined the loops` 11 are' held in place-normally by the relative inclination of said-fingers, the loops b serving as stops pp {ev'ent the loops 11 from passing too far Should the bulb 9 becomebroken, the opposite ends of the saine would fall tothe positions indicated in Fig. 2, the loops 11,turning upon the fingers 8 or dropping off at the'terminal ends. Under these conditions it would be difficult, if not practically impossible, to so connect the platinum oints l10 to cause the wires to become heate As shown in Fig. .3, the face of the illuminating portion of the lamp is provided with an opening 12, adapted to receive a chargingplu-g d.

In gaseous mines and other locations where it would be dangerous to complete a circuit between the two points 10, either by accident or design of" some ignorant person, a safety devicesuch as that described in the forego- A ing specification has been found particularly desirable. When bulbs are broken and' the wires are heated at the ends, explosions are likely tov occur.

Various changes in forni and proportions outside the bulb .and formed into vloops, in

combination with inclined wire fingers passing through the loops' to support the bulb and permit the latter to fall from said fingers when broken.

g n i l@$123730 2. An ineandescent'l electric -4 light .bulb inclined and Mving e tendency to spring latv having its platinum-Wire terminal extended emily.

through 'the-sides df the bulb and terminating HARRY CROSS HUBBELL.

Ain 1oops,end wire ngere extended through Y 5 'the loops for sn porting the "bulb in its nor- In presence ofmal position an ermtting it to drop o the DUNCAN T. MCLAREN,

ingersfwhen broten, said fingers normally I. BAUM. 

